472 CLEVE, DIATOMS. 



Sectio : EUqHiccB. 



N. mtoralis Donk. (A. Schm. Atl. PI. VIII, fig. 23—25) 

 Greenl. (Mushroom Point) Finm., Kara, Cape Deschnew (East 

 Cape). 



N. Smifhii Breb. (A. Sclim. Atl. PL VII, fig. 14—22) Greenl. 

 (Mushroom Point) Finm., Spitsb., Kara (Matotscbkin, Jalmal), 

 Cape Deschnew (East Cape). 



N. fusca Greg. (A. Schm. Atl. PI. VII, fig. 1—4) Finm., 

 Matotscbkin Schar. 



N. (estiva Donk. (A. Schm. Atl. VIII, fig. 26) Finm., Cape 

 Wankarema. 



N. siiborUcularis Greg. (A. Schm. Atl. PI. VIII, fig. 2—5) 

 Greenl. (Davis strait). 



N. Eudoxia A. Schm. (Atl. PI. VIII, fig. 40) Cape Wankarema. 



N. Tschuldscliorum CI. N. Sp. — Small, oval with rounded 

 ends. The middle of the valve has, as in N. Lyra-section, 

 two arcuate, convergent tbickenings, connected by a trans- 

 verse bar at the centre. The space between the margin and 

 the thickenings has coarse, costate stride, 13 inO,oi mm. Length 

 0,01 mm. Br. 0,oo65. — PI. 37, fig. 48. — Cape Deschnew (East Cape). 



This species comes nearest to N. Reichardii Grun. (Van 

 Heurck Syn. PI. X, fig. 9) which is larger and has closer, 

 punctate stria). The N. Mauleri R. J. Brun (Diat. des Alpes et 

 du Jura PL I, fig. 18) is also an allied form, but more nearly 

 related to N. Borussica CI. (Schr. phys. oek. Ges. zu Konigs- 

 berg Bd. XXII, pag. 139, A. Schm. Atl. PL VIII, fig. 17) in 

 Domblitten deposit. 



Sectio: Lijrce. 



N. pygmcea Kiitz. {k. Schm. N. Sea Diat. PL I, fig. 43) 

 Finm., Spitsb., Kara, Cape Deschnew (East Cape). 



N. ahriipta Greg. (A. Schm. 1. c. PL I, fig. 37) Finm., Spitsb. 



N. hijalina Donk. (Brit. Diat. PL I, fig. 1) Finm. 



N. forcquita Grev. (A. Schm. N. Sea Diat. PL I, fig. 45, PL 

 II, fig. 16 & 18) Greenl. (Davis strait). 



N. spedabUis Greg. (Diat. of CI. pag. 481, PL IX, fig. 10) 

 Greenl. 



N. circumsecta Grun. (A. Schm. Atl. PL III, fig. 27—28) Finm. 



N. Hennedyi Sm. (A. Schm. N. Sea Diat. PL I, fig. 41) 

 Greenl., Finm., S})itsb., Kara (Matotscbkin). 



N. Lyra Ebb. (A. .^cbm. Atl. PL II, fig. 16) Greenl., Finm., 

 Spitsb., Kara (Matotscbkin). 



var. elliptica A. Sclnn. (N. Sea Diat. PL I, fig. 38—39) 

 Greenl. (Mushroom Point), Finm., Kara. 



